US Bridges

SR 104 over Trib No Br Mahantango CR

Fair

Snyder County, Pennsylvania · Mt Pleasant Mills · Structure no. 000000000031089

Built
1930
95 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete
Length
29 ft
1 main span
Daily traffic
4,922
2024 count
Owner
State
State Highway Agency

About this bridge

SR 104 over Trib No Br Mahantango CR is a concrete tee beam carrying SR 104 over Trib No Br Mahantango CR in Snyder County, Pennsylvania. It was built in 1930, so it is 95 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 4,922 vehicles a day, roughly 17% of them trucks, projected to reach 6,015 by 2032. The structure is 29 ft (8.8 m) long and 33 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

Location

Open in Google Maps
CarriesSR 104
CrossesTrib No Br Mahantango CR
LocationMt Pleasant Mills
RouteState Highway 104
CountySnyder County
StatePennsylvania
Coordinates40.72311, -77.00537
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width33 ft (10.1 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,922 (2024)
Projected traffic6,015 by 2032
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$311,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 104 over Trib No Br Mahantango CR built?

It was built in 1930, making it 95 years old in 2025.

What condition is SR 104 over Trib No Br Mahantango CR in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does SR 104 over Trib No Br Mahantango CR carry?

About 4,922 vehicles per day (2024 count), of which roughly 17% are trucks.

How long is SR 104 over Trib No Br Mahantango CR?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 33 ft wide.

Who owns SR 104 over Trib No Br Mahantango CR?

It is owned by the State Highway Agency.